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2014 AUDI A6

3.0L Supercharged V6•AWD•AUTOMATIC•gas•supercharged
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor1130Torque6146Fluid15DTC1816Battery0Maintenance0Recalls4
P0139low severityPowertrain

O2 Sensor Circuit Slow Response Bank 1 Sensor 2

on 2014 Audi A6 3.0L Supercharged V6 · AWD

What this code means

The downstream O2 sensor on Bank 1 is responding too slowly.

Symptoms

  • Check Engine Light
  • Failed emissions

Common causes

  • Aging sensor
  • Contaminated sensor
  • Catalyst issue

Diagnostic steps

  1. Monitor sensor response
  2. Check catalyst efficiency

Repair notes

Replace downstream O2 sensor.

Other Powertrain codes on this vehicle

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